Page 1 of 1

Enthalpy is said to be additive

Posted: Sun Jan 26, 2020 7:07 pm
by Andrea_Torres
What does it mean for something to be additive?

Re: Enthalpy is said to be additive

Posted: Sun Jan 26, 2020 7:09 pm
by Julie Park 1G
It's saying that since enthalpy is a state property (not dependent on the path taken to obtain that state), enthalpies can be added (and subtracted).
For example, Hproducts - Hreactants = Change in H

Re: Enthalpy is said to be additive

Posted: Sun Jan 26, 2020 7:54 pm
by WesleyWu_1C
One of the examples that Dr. Lavelle gave for another state property is altitude. For altitude, the path doesn't matter. What matters is where the hiker ends up.

Re: Enthalpy is said to be additive

Posted: Sun Jan 26, 2020 8:02 pm
by Jasmine 2C
it basically means the delta H values can be added together (even if it's a negative number, which will just make the addition into a subtraction)

Re: Enthalpy is said to be additive

Posted: Sun Jan 26, 2020 8:21 pm
by kevinolvera1j
Because Enthalpy is a state function, only the state matters. In other words, what matters is the state, not the way that those states were obtained or the path that led them there. This is what allows enthalpy to be additive.

Re: Enthalpy is said to be additive

Posted: Sun Jan 26, 2020 8:40 pm
by Chris Charton 1B
This is because Enthalpy is a state property. Only the initial and final values are relevant, the path taken to get to the final value does not matter.

Re: Enthalpy is said to be additive

Posted: Sun Jan 26, 2020 9:02 pm
by gabbymaraziti
Enthalpy is additive because it is a state function, meaning it can be added or subtracted.

Re: Enthalpy is said to be additive

Posted: Sun Jan 26, 2020 9:05 pm
by Eesha Chattopadhyay 2K
being additive means that different enthalpies of different reactions can be added. this is true because enthalpy is a state function.

Re: Enthalpy is said to be additive

Posted: Sun Jan 26, 2020 9:28 pm
by RasikaObla_4I
Because enthalpies of different reactions can be added together, it is said to be additive.

Re: Enthalpy is said to be additive

Posted: Sun Jan 26, 2020 9:41 pm
by Nare Nazaryan 1F
It just means that, since enthalpy is a state property, different enthalpies can be added together.

Re: Enthalpy is said to be additive

Posted: Sun Jan 26, 2020 9:53 pm
by 805422680
enthalpies of different reactions can be added together to get the total enthalpy of the system in its change from reactants to products